Need Ideas/help For A "milk Dud"

I am making a birthday cake for my aunt. She absolutely LOVES Milk Duds. I was thinking of making a chocolate cake in the small ball pan, filling it will a caramel of some kind and covering it with ganache. I have never done anything like this, all my cakes are pretty basic! I am not sure what to use for the filling and the prospect of crumb coating the ball is giving me hives!!!! Any ideas or advice are more than welcome! TIA!

What if you just did a box of milk duds? And you could use real ones like spilling out of it or something. ( I did a coffee bean bag with real coffee beans spilling out of it. ) I know I would love a cake like that! I LOVE LOVE LOVE milk duds!!! Wish I had some right now!!!